Fig. 6

Schematic of four different initial conditions for preliminary experiments on the effects of wake and initial vapor velocity. The condition (a) shows the “normal” condition, where the all the vapor energy is given in the form of the thermal one. The condition (b) has a cylindrical hole around the initial vapor cloud as an analog of the impact-induced wake. Its initial bottom radius is set to twice the initial vapor radius. In conditions (c) and (d), the vapor energy is equally divided into the thermal and kinetic energy, respectively. The direction of the initial vapor velocity is isotropic for condition (c) and upward for condition (d). The total vapor energy (the sum of the internal and kinetic one) is the same in all initial conditions.